<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, i nitial-scale=1.0" />
    <title>字符串形式的ref</title>
  </head>
  <body>
    <!-- 准备好一个容器 -->
    <div id="test"></div>

    <!-- 引入react 核心库 -->
    <script
      type="text/javascript"
      src="../../react-js/react.development.js"
    ></script>
    <!-- 引入react-dom 用于支持react操作dom -->
    <script
      type="text/javascript"
      src="../../react-js/react-dom.development.js"
    ></script>
    <!-- 引入babel 用于jsx转为js -->
    <script type="text/javascript" src="../../react-js/babel.min.js"></script>

    <script type="text/babel">
      // 创建组件
      class RefDom extends React.Component {
        // 展示左侧输入框数据
        showData = () => {
          const { input1 } = this.refs;
          alert(input1.value);
        };
        // 展示右侧输入框数据
        showData2 = () => {
          const { input2 } = this.refs;
          alert(input2.value);
        };
        render() {
          return (
            <div>
              <input ref='input1' type='text' placeholder='点击按钮提示数据' />
              &nbsp;
              <button onClick={this.showData}>点击我提示左侧输入框内容</button>
              &nbsp;
              <input
                ref='input2'
                onBlur={this.showData2}
                type='text'
                placeholder='失去焦点提示数据'
              />
            </div>
          );
        }
      }
      // 渲染组件到页面
      ReactDOM.render(<RefDom />, document.getElementById('test'));
    </script>
  </body>
</html>
